Block and tackle



Patented Aug. 23, |898.

W A H S R E K Sh U 8. 3 47 9 0 6 nm N BLOCK AND TACKLE.

(Application med me. a. 199m 2 SheetsfSheet I.

(No Model.)

MTA/E. m@

ma Noms Pneus co.. PHoToLnHo., wAsHmn-row. n. c. A

No. 609,438. Patented Aug. 23, |898.

. C. S. KERSHAW.

BLOCK AND TACKLE.

(Application led Dec. 3, 1896.) (No Model.) 2 Sheets-Sheet 2.

TH: Ncnms PETERS co., Preo'muruo., wAsNmoToN. D. c,

2O pill;

25 the hook.

3o the same in vertical section.

Nrrn

ATENT Brion.

BLOCK AND TACKLE.

SPECIFICATION forming part of Letters Patent No. 609,438, dated August 243, l189.8.

Application lecl December 3, 1896. ,Serial No. 614,317. (No model.)

and useful Improvements in a Block and Tackle; and I do hereby declare that the following is a full, clear, and exact description of the invention, which Will enable others skilled in the art to which it appertains to make and 1o use the same, reference being had to the accompanying drawings, and to the letters and figures of reference, marked thereon, which form part of this specification.

In the drawings, Figure 1 shows a side elet 5 vation of my improved block and tackle. Fig.

2 shows an edge view ofthe upper block. Fig. 3 shows an edge view of the lower block; Fig. 4 shows avertical section of the lower block; Fig. 5 shows in perspective a sheave-bearing Fig. G shows a side elevation of a twopart or double hook employed in the construction. Fig. 7 shows an inner face View of one part of the hook. Fig. 8 shows an edge view of the same. Fig. 9 shows the other part of Fig. 10 shows an edge view of the same. Fig. 11 shows a section of the hook, taken on line A B of Fig. 9. Fig. 12 shows a rope-securing device for securing one end of the rope to the tackle-block. Fig. 13 shows Fig. 1.4 shows a perspective view of one oi the conical parts employed. Fig. 15 shows a perspective view of the other conical sleeve. Figs. 16 and 17 show the two parts of a two-part conical wedge 3 5 for securing the rope in the sleeve shown in Fig. 15. Fig. 1S shows in perspective View one of the division-plates employed in the pulleys between the sheaves. Fig. 19 shows a division-plate in connection with hangers 4o constituting a part of the framework of the blocks.

Referring to the reference letters and iigures in a more particular description of the device, 1 indicates the frame of the upper block which supports the sheave-bearing pins 2 2 at considerable distance from each other, and on each of these pins 2 2 are mounted a pair of sheaves or pulleys 3 3. The opposite sides of the frame are in part secured to- '5o gether by the bearing-pins 2 2,*which are provided with a reduced end 2 andv a key-like bit 2b, which is adapted to pass through Fa l suitable opening 2c in the frame, and when passed through the pin' is given a partial rotation, sothat the bitwill stand in the position shown in Fig. 1. The opposite sides of thefram'e are thereby securedtogether. On the upper side of the pin 2 .is provided a groove 2d for the flow ot' lubricant for the sheaves, which lubricant is introduced through the keyhole-openin gs 2C in the frame.

In connection with the upper pulley-block are provided two rope locks or clutches 4 and 5, pivoted to arms from the opposite sides of the frame at fl and 5, respectively. These clutches are provided with arms to which is attached a branching cord 6, by means of fwhich they may be operated to'disengage them. These rope-clutches are provided at either s ideof the block, as shown, one for each set of sheaves.

Inthe upper pulley-block is provided a division-plate 7 between the sheaves, which plate is secured by the pin 2 passing through the opening 7 therein, and the plate is rel tained in position and from rotation by the projections 1a 1a from the opposite sides of the `frame engaging and meeting between the lugs 7b on the part 7.

The lower pulley-block; consists of three pulleys 8, 9, and 10, mounted on a single pin 11 (similar in construction to pin 2) and in the frame composed of the outer parts l2 12 and inner parts 13 13r of the frame. The outer parts 12 are' extended downward in a lug or projection 12a, having an inwardly-extending boss 12b, while the inner frame parts 13 are extended downward in projections 13, having outwardly-projecting bosses 13b. A hole is provided through the lower ends of these frame projections and through the bosses referred to, and the lower end oir' the pulley is held together by a bolt 14 passing through the same. `The two sets of bosses 12b and 13b form substantial bearings for the two-part hook 15, the parts of which are hinged thereon and free to swing to and fro, as well as to have a slight lateral movement on the bosses. The hook consists of the two parts 15 15, which are duplicates of each other, curved, and of the shape shown andare provided each with two transverse teeth o. and a longitudinal tooth b and with two transverse depressions or indentations c and a ICO lateral indentation cl, so that when the two parts of the hook are brought together, as shown in Fig. 6, the teeth will interlock with the indentations and make the hook strong and solid to withstand the hard usage to which a tackle-hook is subjected. For attaching one end of the rope to the lower tackle-block the inner frame parts 13 are provided with upwardly-extending arms 13C, which at their upper ends are adapted to receive the lateral projections 16 from the conical holder 17. The projections 16 are provided with keylike bits 16a, and the ends of the arms 13C are provided with downwardly-extending keyhole-openings adapted to receive the bit and projection referred to. By this arrangement the upper part of the inner portion of the frame of the lower pulley is supported, as well as a swiveling fastening provided for the end of the rope. The part 17 is adapted to .receive the conical sleeve 18, provided with a bail 18a and a shoulder 18h, which engages on the lower end of the holder 17, as shown particularly in Fig. 3. The sleeve 18 is adapted to receive the end of the rope, as shown in the drawings, particularly Figs, 12 and 13, and the same is secured by a two-part corrugated conical wedge 19. The two parts of this wedge enable it to be placed from each side of the bail 18a, while the bail prevents the rope from shoving through the fastener or the fastener becoming loose and dropping oft while the rope is used without being secured to the lower pulley-block, as hereinafter described. The bail 18a also operates to prevent the wedge 19 from getting so far out of position as to fail to operate.

The tackle may be strung up as shown in Fig. 1, in which one end X is used as a pullrope, while the other end is secured to the lower tackle-block, as shown and described. In this way the operation of the tackle is obvious, and it may only be necessary to note that on account of the distance apart at which the sets of wheels are placed in the upper block the tackle as a whole may be closed up, so that the lower block takes a position nearly between the uppersh eaves, and the tackle is capable of being closed toarninirnum of length, while with the tackle the locks or clutches 4 and 5 automatically secure the tackle whenever the power on the pull-rope is released. When the tackle is used as shown in Fig. 1, the clutch 4 may be tied, so that it will not operate, as the clutch 5 will serve all necessary purposes. In lowering the lower block the clutch 5 is thrown out by pulling on the cord attached to it, as shown, or both clutches are pulled out when both are in use. In order to provide a tackle which is capablel of accomplishing a more rapid hoist, the end of the rope which is attached to the lower block may be disengaged and passed down the outer side of one of the upper sheaves, as shown in dotted lines at Y-that is, the rope is passed the other way around the sheaves. Then two men may operate on the pull-ropes X and Y at the same time, and in such case both clutches 4 and 5 are used to secure whatever advantage is gained. When strung up in the manner last described, the tackle may of course be operated by one man, in which case one or the other of the clutches will secure the rope, which might be used as the other pull-rope. The hook for supporting the upper tackle-'block is the same as the one described in connection with the lower tackleblock. Y

What I claim as new, and desire to secure by Letters Patent, is-

1. In a tackle, a rope-fastener consisting of an external sleeve secured to the tackle-block frame, an internal shouldered conical sleeve adapted to receive the end of the rope, a bail over and secured to the larger end of said conical sleeve and a two-part conical wedge adapted to separate the fibers of the rope and bind them in the inner sleeve, substantially as set forth.

2. Atackle-block frame having registering bosses on opposite parts, the securing-bolt passing through the frame and bosses, and a pair of interlocking hooks having eyes or holes at right angles with the line of separation between the hooks, which eyes receive the said bosses, substantially as set forth.

In witness whereof I have afxed my signature in presence of two witnesses.

CHARLES S. KERSHAVV. Vtitnesses:

E. W. WALKER, H. H. TUCKER. 

